If a plant needs exposure of light less than a defined period for flowering, such plant is called

If a plant needs exposure of light more than a well defined critical period for flowering, it would be called as-

When there is no such relation between exposure to light duration and induction of flowering response such plants are called

A physiological response of plants to the duration of light and darkness is a:-

(1) daily phase cycle

(2) circadian rhythms

(3) biological clock

(4) photoperiodism

Refer the given figures on photoperiodism and select the correct option.

For the induction of flowering, some plants require a

Which of the following is the site for perception of light/dark in plants?
1. Root apex
2. Shoot apex
3. Leaves
4. Flower

With respect to photoperiodism, the short day plant, the long day plant and day neutral plant are represented respectively by:
  
1. A, B and C
2. B, A and C
3. C, B and A
4. A, C and B

The photoperiod in plants is perceived at

1. meristem

2. flower

3. floral buds

4. leaves

Read following statements and answer in suitable term given in option:-

a. The promotion of flowering by a period of low temperature

b. Hormonal substance migrates from leaves to shoot for inducing flowering 

c. The general metabolic activity of the embryo slow down or in inactive state 

d. Formation of separation layer between tissue

1. Photoperiodism, vernalisation, abscission layer, dormancy

2. Vernalisation, photoperiodism, dormancy, abscission layer

3. Dormancy, photoperiodism, vernalisation, abscission layer

4. Abscission layer, vernalisation, dormancy, photoperiodism